由于先导卸荷阀5内的单向阀作用，可以实现系统保压而油泵卸荷。
The pilot unloading valve 5 of the one-way valve can be achieved system-pressure pump and unloading.
该阀采用环空外压操作测试阀的开关，不需要保压，而且采用简单的机械压力平衡机构代替了专用计量套。
Without keeping annulus pressure to static and instead of special metering by simple mechanical pressure ba lance structure, this valve is conducted by annulus pressure.
液压系统可以采用液控单向阀、蓄能器、液压泵等多种形式实现保压。
A single - direction valve controlled by liquid, an accumulator and hydraulic pumps can be used to keep pressure in hydraulic systems.
高速回转液压缸内集成了由两个液控单向阀组成的液压锁，对液压缸保压。
There is a hydraulic lock which is composed of two pilot controlled check valves in the rotary cylinder to retain pressure.
只要阀门关闭效果良好，保压时，高压截止阀关闭，后端压力容积变小，压力增大。
As long as the valve closure effect is good, when the pressure, high pressure cut-off valve is closed, the back-end pressure volume smaller, pressure.
通过建模、仿真分析，可以在设计这种保压系统过程中，较好地确定单向阀的泄漏特性，为选用元件提供依据。
The leakage characteristic of the rebound valve can be established by building the simulation model in the process of designing this kind of hydraulic system, according tow…
通过建模、仿真分析，可以在设计这种保压系统过程中，较好地确定单向阀的泄漏特性，为选用元件提供依据。
The leakage characteristic of the rebound valve can be established by building the simulation model in the process of designing this kind of hydraulic system, according tow…
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